Results 11 to 20 of about 3,064,923 (268)
Flow-through microfluidic relative permittivity sensor using highly-doped silicon sidewall electrodes [PDF]
Journal of Micromechanics and MicroengineeringAbstract This paper reports a flow-through sensor for the real-time measurement of the relative permittivity of a flowing fluid. The proposed sensor contains multiple parallel microchannels. Each channel acts as a parallel plate capacitor in which the electrodes are isolated from the fluid.
M J S Bonnema +4 more
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Inline and Real-Time Microfluidic Relative Permittivity Sensor Using Highly Doped Silicon Sidewall Electrodes [PDF]
2024 IEEE 37th International Conference on Micro Electro Mechanical Systems (MEMS)This paper reports an inline sensor for thereal-time measurement of the relative permittivity of acontinuously flowing fluid, with electrodes that areelectrically isolated from the fluid. The sensor has beencharacterised for relative permittivity values ranging from1 to 80 – including water and water-containing mixtures –showing an accuracy within 3 ...
Bonnema, Maarten J.S. +4 more
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Estimation of Relative Permittivity and Thickness for Dielectric Materials Using an Open-Ended Waveguide Sensor [PDF]
, 2016 The main goal of this thesis has been to conduct a feasibility study on an open-ended waveguide sensor as a tool for estimating the relative permittivity and thickness of dielectric layers in the thickness range 0.5-5 cm. To achieve this purpose, a reflection coefficient measurement technique was implemented.
Nikparvar, Bahareh
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Measurement of Electrical Discharge Machining Oil Quality by Analyzing Variations in the Equivalent Relative Permittivity of the Capacitive Sensor [PDF]
Sensors, 2020 In this study, a concentration monitoring system was successfully developed. A sensor was immersed in electrical discharge machining oil, and the capacitance of the sensor changed as a function of the impurity concentration. Thus, DC voltage variations were produced via a conversion circuit. Carbon black and iron particles with different concentrations
Shih-Jui Chen +6 more
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Biosensors and Bioelectronics: X, 2022 This paper aims to monitor human fever using wearable sensors as a non-invasive and real-time method. Our purpose is based on the use of textile sensors that can be integrated with the person’s clothes.
Sina Rahmani Charvadeh, Javad Ghalibafan
doaj +1 more source
Sensors, 2022 The article concerns the issue of non-invasive moisture sensing in building materials. Two techniques that enable evaluating the value of the relative permittivity of the material, being the measure of porous material moisture, have been utilized for the research.
Zbigniew Suchorab +6 more
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Micromachines, 2023 Substrate-integrated waveguides (SIWs) are widely used in microwave systems owing to their low cost and ease of integration. In this study, an SIW-based resonator that reacts to the complex permittivity variation of solutions with dimensions of 79.2 mm ×
Chun-He Quan +2 more
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Sensors, 2022 A shortage of research on the impact of atmospheric parameters on the measured dielectric permittivity values of rigid polyurethane (PU) foams was identified.
Ilze Beverte +3 more
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Frontiers in Robotics and AI, 2021 Developing highly sensitive flexible pressure sensors has become crucially urgent due to the increased societal demand for wearable electronic devices capable of monitoring various human motions.
Zhaoqing Kang +5 more
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A New Planar Microwave Sensor for Building Materials Complex Permittivity Characterization
Sensors, 2020 A new microwave sensor is proposed to characterize the complex relative permittivity of building non-magnetic materials and used in the characterization of three concrete samples.
João G. D. Oliveira +4 more
doaj +1 more source